Brush.



H. E. HOOVER.

` BRUSH. APPLICATION FILED OCT. 9II9I5.

Patented. D00. 3, IQIS.

' Leanser.

HOWABDVERL HOOVER, OF CHICAGO, VILILJINOIS, ASSFGNOR TO HOOVER SUC'I'ION SWEEPER COMPANY, OF NEW BERLIN, OHIO, A CORPORATION 0F OHIO.

BRUSH.

Specification of Letters Patent.

Ll n." l 4 Patented Dec. 3, initd.

vacuum cleaners and means for mounting the saine and associating a thread guard therewith.

Thebrush as applied to a vacuum cleaner in one form is illustrated in the accompanying drawings'wherein Figure 1 is a plan view with parts removed; Fig. 2 is a vertical section on the line 25-2 of Fig. l;

Fig. `3 is a cross section on the line--S Fig. 4t is a detail section on the line 4-4 of F ig.' 3; L

Fig. 5 is an end view of the brush and a, portion of the mounting means with parts broken away.

Fig. 6 is a detail cross section through the end of the brush and associated parts.

Like parts are indicated by the sarne letter n all the figures. l

A is the casing or hood of a vacuum sweeper., in the nozzle or open mouth of which the brush is to be placed. The brush consists of a body B which 4is here shown and preferably is hollow. lt has enlarged ends C C and a shaft D which passes throughl vthe hollow body.' In each end of the bodyA is a bearing sleeve E through which th@ shaft passes.4 These bearing` sleeves are secured in position in any desired manner and they preferably project at each end a little beyond the outer surface 0fv the enlarged body ends C. This is only said to indicate that other features of the invention are not to be restricted to use in connection with the hollow7 body.

yllhe ends of the shaft D are secured or supported in any desired manner in the frame. l j

Un each end of the shaft- Whatever may be 'its structure is mounted a thread guard F which is cup-shaped. lt overhangs and includes the outer end of the body and is perforated at H H so as tof pern'iit air to pass inwardly through .the bottoni of such cupshaped thread guard and then outwardly Vthrough the edge of the end of the body as indicated by the arrow' in Fig. 2. The parts are so arranged that the thread guard when secured on the shaft, as for example by the threads at G, the brush is pre vented from longitudinal movement while being free to rotate on the shaft. rFhe parts are also so arranged that the bottoni of the cup shaped thread guard is spaced from ,the end of the body end thus leaving the air channel and space above referred to. On the preferred -form of my device the end of the brush body takes the form of a flange C1 with a depression C2 thereabout. The recess or depression C2 serves as a kind of recepj tacle or reservoir to hold hair, thread, films, and the like. @ne of its edges may be beveled as indicated in Fig. 6.

The brush body is provided with a series of bosses projecting therefrom, and in this case arranged in the form of spirals. This reduces the labor of making the recesses into whichthe bunches of brush bristles have to be inserted for each boss is cast or formed integralwith the body so that it is in the proper position and relation.. When the boss is recessed radially the brush bristles, if inserted in such recesses, will project out' wardly in the proper manner. Each boss is provided` with a side `perforation and of course there may be one or inore, or they may be arranged in any desired manner, through which the securing wire or twine is inserted. rllhis wire or twine passes between the bristles in the proper manner and out and thence to the next boss where in like manner it serves t0. secure the vnentset of bristles. bristles are arranged so as to effectually sweep practically the entire surface area included between the ends of the mouth or inlet and particularly the bristles next to the central driving pulley J are set so as to overhang the pulley face. Speaking gen-v erally of the entire, structure the arrangement most effectively prevents the parts from displacement or injury or from being forced into inoperative relations. Cases and frames with which such brushes are vco1ninonly used are not infrequently made of light material capable of abundant giving and changing shape subject to blows. One

The bosses, and therefore the- `suitable casing.

object. of my invention, therefore, is to mount my brush on the shaft in such way that it will not respond to or be injured by variations in the shape and form of the case support or frame. In the structure shown the shaft and brush always maintain their parallelism and their bearing surfaces are never cramped, twisted or shifted with reference to each other.

It will be understood that I do not wish to confine myself to the particular form, size, arrangement or shape of the several parts, or to the simultaneous use of all of them. Some of them may be dispensed with `without, departin lfrom the spirit of my invention, and su stitutes may be employed in lieu of others. I wish my drawings to be taken as in a sense diagrammatic intending only to suggest the general principles of my invention.

The bosses in addition to the other functional results ascribed to their-use, call for a minimum of material but they are only the preferred form. The centering point in the course of manufacture can be marked on the bosses so as to leave no uncertainty as to the point Where the recess is to be made in order that the bristles may be in the right position. I have shown the bristles as secured by wire and suggest that they might be secured by twine and that they could alsobe secured in any desired manner and the parts thus could be'made of any desired material. If the bristles were secured in the recesses of the bosses by other vmeans than wire or twine the lateral perforations in the bosses could be dispensed with.

The use and operation of my invention are sufliciently suggested by the description, of the form illustrated but a further statement of the matter is` prepared.

The brush device when as in the illustration provided with val shaft whose ends project can be mounted in any desired manner the shaft being rotatably or otherwise supported in the frame 1or case. In either event, the brush body is free to rotate on the shaft. The brush when its parts vare assembled with the thread guard at the end can be inserted as a complete device in any Vith such a structure the air underproper conditions is fee to move 'inwardly along the brush to keep thread,

hair and the like from getting'at the brush bearings. This action is further aided by the depression next to the end flange on the brush body/L This depression and flange also t'end to prevent the entrance of hair and the like in the space about the bearing.

Thus in the preferred fomn of the device the thread, hair and the like is prevented from entering the space about the bearing by means of the depression and the llange and such thread, hair and the like is forced out of the space around the bearing by means of the inwardly drawn current of air. Aspreviously suggested, an important feature of my invention whether' the brush body be hollow or not and whatever may be the shaft arrangement is uniting the bearings with the brush body so as to get them permanently and rigidly mounted in proper relation and alinement; This is particula-rly important where a high speed brush such as that to which my improvements refer is to be mounted in a thin, light or yielding frame or case such as those usually employed in vacuum sweepers or cleaners.

I claim:

l. A brush device comprising a rotatable brush body provided with a flange on its end,'a narrow circumferential groove adjacent the ange and a cup-shaped thread guard over-hanging such groove.

Q. A brush device comprising a rotatable brushbody provided with a flange on its end, a. narrow circumferential groove adjacent the flange anda cup-shaped thread gua-rd overhanging such groove, that side of the groove opposite the flange being beveled.

3. A brush device comprising a rotatable brush body provided with a flange on its end, a narrow circumferential groove adjacent the flange Vand a cup-shaped thread guard overhanging such groove, said eupshaped guard spaced from the flange so as to leave an annular opening between them.

.4. A brush device comprising a rotatable brush body provided with a flange on its end, a narrow circumferential groove adjacent the flange and a cup-shaped thread guard overhanging such groove, that side of the groove opposite the flange being beveled, said cup-shaped `guard spaced from the ange so as to leave an annular opening between them.

In testimony whereof, I allix my signature in the presence of two witnesses this 22nd day of September, 1916.

'HOWARD EARL Hoeven.

Witnesses z* MINNIE M. LINDENAU, RUTH E. CAnLsoN. 

